CN214075960U - Lime kiln tail gas desulfurization denitration dust removal integration processing apparatus - Google Patents
Lime kiln tail gas desulfurization denitration dust removal integration processing apparatus Download PDFInfo
- Publication number
- CN214075960U CN214075960U CN202022624380.XU CN202022624380U CN214075960U CN 214075960 U CN214075960 U CN 214075960U CN 202022624380 U CN202022624380 U CN 202022624380U CN 214075960 U CN214075960 U CN 214075960U
- Authority
- CN
- China
- Prior art keywords
- lime kiln
- tail gas
- inlet
- kiln tail
- denitrification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model belongs to the technical field of exhaust-gas treatment, concretely relates to lime kiln tail gas SOx/NOx control dust removal integration processing apparatus. The device comprises a filtering reactor, wherein the filtering reactor is divided into an air inlet chamber at the lower layer and an exhaust chamber at the upper layer, a plurality of double-layer filter bags are arranged in the filtering reactor, and each double-layer filter bag comprises an outer dust removal cloth bag and an inner catalytic filter bag; the flue gas inlet of the air inlet chamber is connected with an inlet pipeline, and a desulfurizer spraying inlet and a denitrifier spraying inlet are sequentially arranged on the inlet pipeline along the flow direction of the flue gas. This device integrates the processing with desulfurization, denitration, dust removal, and the construction cost is lower, has reduced area, and the desulfurization removes dust and does not have the temperature drop to the denitration between to guarantee the temperature of denitration operation, strengthened operating stability, reduced catalyst use amount.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas treatment, concretely relates to lime kiln tail gas SOx/NOx control dust removal integration processing apparatus.
Background
Along with the increasing strictness of environmental protection requirements, the emission requirements on the waste gas of the lime kiln are higher and higher, and the dust is required to be lower than 10mg/Nm by part of the existing local standards3Sulfur dioxide less than 50mg/Nm3Nitrogen oxides less than 150mg/Nm3Therefore, higher requirements are also put on the waste gas treatment process and flow. Influenced by the production process of the lime kiln, the temperature of the generated flue gas of the lime kiln is lower (160 ℃ -3) The nitrogen oxide content is higher (usually less than 500 mg/Nm)3) And simultaneously, as lime is produced by a lime kiln, about half of calcium oxide and other harmful alkaline earth metal oxides are contained in the dust.
The existing lime kiln flue gas treatment process mostly adopts a technical route of dry desulfurization, high-temperature cloth bag dust removal and low-temperature SCR process, the technical route is a traditional device for sectional desulfurization, denitrification and dust removal, and although the emission requirement can be met, the existing lime kiln flue gas treatment process has the adverse effects of large investment and large occupied area. Particularly, for the reconstruction of the established lime kiln, large floor area is often a restriction factor, and the existing space cannot meet the arrangement space of high-temperature cloth bag dust removal and low-temperature SCR. In addition, due to the sectional arrangement of dust removal and denitration, the temperature of the lime kiln flue gas which is originally not high in temperature is lower after dry desulfurization and cloth bag dust removal, sometimes even can be as low as about 100 ℃, and the temperature is very unfavorable for denitration and even cannot be operated. Meanwhile, because the temperature of the flue gas is low, the risk of moisture condensation in the flue gas is also faced; the desulfurized sulfide is also easy to mutually influence with water, so that the denitration catalyst is inactivated, and the emission is not up to the standard. At such low temperatures, the amount of low-temperature denitration catalyst used increases exponentially, and the cost of the low-temperature catalyst increases accordingly.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims to provide a lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device, which couples three processes of desulfurization, denitrification and dedusting in the same device, reduces the construction cost of the device and the occupied area; and because the integration of three kinds of devices is arranged, just carry out the denitration immediately after the desulfurization is removed dust promptly, therefore guaranteed the temperature when carrying out the denitration, avoid appearing too high temperature drop for low temperature catalyst can work under the relatively higher temperature.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: the lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device comprises a filtering reactor, wherein the filtering reactor is divided into an air inlet chamber at the lower layer and an exhaust chamber at the upper layer, a plurality of double-layer filter bags are arranged in the filtering reactor, and each double-layer filter bag comprises an outer-layer dust removal cloth bag and an inner-layer catalytic filter bag; the flue gas inlet of the air inlet chamber is connected with an inlet pipeline, and a desulfurizer spraying inlet and a denitrifier spraying inlet are sequentially arranged on the inlet pipeline along the flow direction of the flue gas.
As a preferable technical scheme, a mixer is arranged at the denitration agent spraying port in the inlet pipeline.
As a preferred technical scheme, the mixer comprises an air inlet main pipe connected with the denitration agent spraying inlet and an evenly distributed branch pipe communicated with the air inlet main pipe, and a plurality of spraying openings are formed in the evenly distributed branch pipe.
As a preferred technical scheme, the uniformly distributed branch pipes are uniformly distributed in the radial section of the inlet pipeline.
As a preferable technical scheme, a flow guide device is arranged in the air inlet chamber.
As a preferred technical scheme, the flow guide device is a plurality of flow guide sheets which are arranged in parallel with the air inlet direction.
As a preferable technical scheme, the guide vane is trapezoidal, and the windward side of the guide vane is a trapezoidal inclined plane.
As a preferable technical scheme, an ash hopper is arranged at the bottom of the filtering reactor.
As a preferred technical scheme, a back-blowing device for carrying out back-blowing and ash removal on the double-layer filter bag is arranged in the filtering reactor.
As a preferable technical scheme, an air source of the back blowing device is hot flue gas exhausted from an exhaust chamber.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has at least:
(1) flue gas generated by the lime kiln enters the filtering reactor through the inlet pipeline, a desulfurizer and a denitrifier are sprayed into the inlet pipeline in sequence, and the desulfurizer and the denitrifier are uniformly mixed in the pipeline, so that the desulfurizer, the denitrifier and the flue gas are uniformly mixed. Then the mixed flue gas enters a filtering reactor, the filtering reactor comprises a plurality of double-layer filter bags arranged in an array, the outer layer is a dust removal cloth bag, and the inner layer is a catalytic filter bag. The desulfurizer reacts with sulfide in the flue gas after being sprayed into the flue gas to generate a desulfurization product (which is a solid substance) to become solid particles of the flue gas, and when the flue gas passes through the outer-layer filter bag, the solid particles in the flue gas (including dust in the flue gas, the desulfurization product and the unreacted desulfurizer) can be retained by the outer-layer dust-removing filter bag and remain on the outer surface of the filter bag. The flue gas after dust removal and desulfurization enters the inner-layer catalytic filter bag through the outer-layer filter bag, and nitrogen oxides in the flue gas on the catalytic filter bag are subjected to denitration reaction under the action of a catalyst loaded on the catalytic filter bag, so that the aim of denitration is fulfilled. The flue gas after the purification flows and collects the exhaust chamber on upper portion by the filter bag is inside, gets into the draught fan by the exhaust chamber and discharges through chimney standard again, and this device integrates the processing with SOx/NOx control dust removal, and the construction cost is lower, reduces area.
(2) No temperature drop exists between the desulfurization and the dust removal and the denitration, so that the denitration operation temperature is ensured, the operation stability is enhanced, and the use amount of the catalyst is reduced.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic diagram of the mixer;
FIG. 4 is a schematic structural diagram of a blowback apparatus;
FIG. 5 is a schematic structural view of a double-layer filter bag.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1 to 5, the lime kiln tail gas desulfurization, denitrification and dust removal integrated treatment device comprises a filter reactor 10, wherein the filter reactor 10 is divided into an air inlet chamber 11 at a lower layer and an air outlet chamber 12 at an upper layer, and a plurality of double-layer filter bags 13 are arranged in the filter reactor 10 and are distributed in an array; referring to fig. 5, the innermost part of the double-layer filter bag 13 is a bag cage 131, two layers of filter bags are wrapped outside the double-layer filter bag 13, that is, an outer layer of dust-removing cloth bag 132 and an inner layer of catalytic filter bag 133, the outer layer of dust-removing cloth bag 132 is used for filtering dust and desulfurization products, the inner layer of catalytic filter bag 133 is loaded with a catalyst and has a denitration function, and flue gas subjected to dust removal and desulfurization by the outer layer of filter bag enters the filter bag for denitration and can be further removed; the flue gas inlet of the gas inlet chamber 11 is connected with an inlet pipeline 20, and a desulfurizer spraying inlet 21 and a denitrifier spraying inlet 22 are sequentially arranged on the inlet pipeline 20 along the flow direction of the flue gas, wherein the desulfurizer is used for removing sulfides, and the denitrifier is used for removing nitrogen oxides.
Since the denitration agent is injected as a gas, in order to ensure the denitration efficiency, it is necessary to ensure uniform mixing of the denitration agent and the flue gas, and therefore, a mixer 30 is provided in the inlet duct 20 at the denitration agent injection port 22 for mixing the denitration agent and the flue gas.
Referring to fig. 3, the mixer 30 includes a main air inlet pipe 31 connected to the denitration agent injection port, and a uniform distribution branch pipe 32 communicated with the main air inlet pipe 31, and the uniform distribution branch pipe 32 is provided with a plurality of injection ports 33. The equispaced branch pipes 32 are equispaced within the radial cross-section of the inlet duct. The denitrifier enters the inlet pipeline 20 from the main gas inlet pipe 31, then is uniformly distributed in the fluid by the uniformly distributed branch pipes 32, and is uniformly sprayed into the flue gas by the spray ports 33 on the uniformly distributed branch pipes, so that the aim of uniform mixing is fulfilled.
The flow guide device 14 is arranged in the air inlet chamber 11, and the flow guide device 14 is a plurality of flow guide sheets which are arranged in parallel with the air inlet direction, so that the flue gas entering at a high speed is prevented from directly impacting the surface of the double-layer filter bag 13, and the filter bag is prevented from being damaged; the flow deflector is trapezoidal, the windward side of the flow deflector is a trapezoidal inclined plane, and the flow deflector is gradually enlarged from top to bottom in the transverse direction, so that the airflow can be uniformly distributed to each filter bag. Meanwhile, the flow guide device at the position can ensure the continuous disturbance of the gas, and the condition that the desulfurizer mixed in the gas is settled is avoided.
The bottom of the filtering reactor 10 is provided with a dust hopper 15, the intercepted dust and the generated desulfurization products on the outer surface of the double-layer filter bag 13 can settle down at the position, meanwhile, the dust accumulated on the outer surface of the filter bag can fall down at the position after being blowback, and the bottom of the dust hopper 15 is provided with a baffle door 17 which can be opened periodically to remove the dust at the bottom.
A back-blowing device 16 for back-blowing and ash-removing the double-layer filter bag is arranged above the double-layer filter bag in the filter reactor 10; the double-layer filter bag is subjected to back blowing through the back blowing device 16 arranged inside, and back-blown gas enters from the filter bag opening and flows from the inside to the outside of the bag, so that dust accumulated on the outer surface of the filter bag is blown off, and the device can continuously and stably operate. The air source of the back flushing device 16 is preferably from the clean hot flue gas discharged from the exhaust chamber 12, so that the temperature of the gas entering the back flushing can be ensured not to be lower than the temperature of the main flue gas, and the phenomenon that the temperature is suddenly low due to the use of normal-temperature compressed air and the like, expansion with heat and contraction with cold of the filter layer are caused, and the filter layer is damaged is avoided. As a preferable scheme, the back-blowing device can adopt movable fixed-point back-blowing, the internal structure is a movable back-blowing pipe, referring to fig. 4, the back-blowing device is composed of a back-blowing main pipe 161 and a plurality of back-blowing branch pipes 162, the back-blowing branch pipes 162 are provided with a plurality of pipe orifices 163, and the pipe orifices 163 directly correspond to inlets of each filter bag. The back-blowing branch pipe can directly correspond to the upper end part of the filter layer, thereby ensuring the effectiveness and quality of back-blowing. The traditional pulse back-blowing control is replaced by the movement control, so that the arrangement of back-blowing equipment is reduced, and the running stability of the back-blowing device is improved.
Referring to fig. 1, the working principle of the present invention is as follows: the flue gas that the limekiln produced spouts desulfurizer and denitrifier in proper order in entry pipeline 20, and both mix in the pipeline evenly, guarantee desulfurizer, denitrifier and flue gas homogeneous mixing. Then the mixed flue gas enters the filter reactor 10, the flue gas enters from the lower part of the filter reactor 10, the flue gas is uniformly distributed by the diversion device 14 and then uniformly enters the surface of the filter bag, then the flue gas is filtered, purified and denitrated by the double-layer filter bag, the purified flue gas flows out from the interior of the filter bag and is collected to the exhaust chamber at the upper part, the purified flue gas enters the induced draft fan from the exhaust chamber and then is discharged after reaching the standard through the chimney, and the outlet flue gas can be extracted to partially enter the back blowing device to back blow the filter bag.
In conclusion, this device integrates desulfurization, denitration, dust removal and handles, and the construction cost is lower, has reduced area, and the desulfurization removes dust and does not have the temperature drop to the denitration between to guaranteed the temperature of denitration operation, strengthened operating stability, reduced catalyst use amount.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (10)
1. Lime kiln tail gas SOx/NOx control dust removal integration processing apparatus, its characterized in that: the device comprises a filtering reactor, wherein the filtering reactor is divided into an air inlet chamber at the lower layer and an exhaust chamber at the upper layer, a plurality of double-layer filter bags are arranged in the filtering reactor, and each double-layer filter bag comprises an outer dust removal cloth bag and an inner catalytic filter bag; the flue gas inlet of the air inlet chamber is connected with an inlet pipeline, and a desulfurizer spraying inlet and a denitrifier spraying inlet are sequentially arranged on the inlet pipeline along the flow direction of the flue gas.
2. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 1, characterized in that: and a mixer is arranged at the denitration agent spraying inlet in the inlet pipeline.
3. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 2, characterized in that: the mixer comprises an air inlet main pipe connected with the denitration agent spraying inlet and uniformly distributed branch pipes communicated with the air inlet main pipe, and a plurality of spraying openings are formed in the uniformly distributed branch pipes.
4. The lime kiln tail gas desulfurization, denitrification and dust removal integrated treatment device as claimed in claim 3, characterized in that: the uniformly distributed branch pipes are uniformly distributed in the radial section of the inlet pipeline.
5. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 1, characterized in that: and a flow guide device is arranged in the air inlet chamber.
6. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 5, characterized in that: the flow guide device is a plurality of flow guide sheets which are arranged in parallel with the air inlet direction.
7. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 6, characterized in that: the guide vane is trapezoidal, and the windward side of the guide vane is a trapezoidal inclined plane.
8. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 1, characterized in that: and an ash hopper is arranged at the bottom of the filtering reactor.
9. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 1, characterized in that: and a back-blowing device for back-blowing and ash-removing the double-layer filter bag is arranged in the filter reactor.
10. The lime kiln tail gas desulfurization, denitrification and dedusting integrated treatment device as claimed in claim 9, characterized in that: and the air source of the back blowing device is hot flue gas exhausted from the exhaust chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022624380.XU CN214075960U (en) | 2020-11-13 | 2020-11-13 | Lime kiln tail gas desulfurization denitration dust removal integration processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022624380.XU CN214075960U (en) | 2020-11-13 | 2020-11-13 | Lime kiln tail gas desulfurization denitration dust removal integration processing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214075960U true CN214075960U (en) | 2021-08-31 |
Family
ID=77449611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022624380.XU Active CN214075960U (en) | 2020-11-13 | 2020-11-13 | Lime kiln tail gas desulfurization denitration dust removal integration processing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214075960U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975964A (en) * | 2021-11-05 | 2022-01-28 | 内蒙古君正化工有限责任公司 | Tail gas circulating equipment of sleeve lime kiln |
| CN114618297A (en) * | 2022-04-15 | 2022-06-14 | 深圳市凯盛科技工程有限公司 | Manufacturing method, device and system of flue gas treatment device |
| CN114931850A (en) * | 2022-07-08 | 2022-08-23 | 江苏天洁环保装备有限公司 | Dry desulfurization, denitrification and dust removal integrated system |
| CN117085481A (en) * | 2023-09-24 | 2023-11-21 | 合肥水泥研究设计院有限公司 | Flue gas denitration equipment for dry-method cement production line |
-
2020
- 2020-11-13 CN CN202022624380.XU patent/CN214075960U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975964A (en) * | 2021-11-05 | 2022-01-28 | 内蒙古君正化工有限责任公司 | Tail gas circulating equipment of sleeve lime kiln |
| CN113975964B (en) * | 2021-11-05 | 2023-12-22 | 内蒙古君正化工有限责任公司 | Tail gas circulation equipment of sleeve lime kiln |
| CN114618297A (en) * | 2022-04-15 | 2022-06-14 | 深圳市凯盛科技工程有限公司 | Manufacturing method, device and system of flue gas treatment device |
| CN114618297B (en) * | 2022-04-15 | 2023-11-17 | 深圳凯盛科技工程有限公司 | Manufacturing method, device and system of flue gas treatment device |
| CN114931850A (en) * | 2022-07-08 | 2022-08-23 | 江苏天洁环保装备有限公司 | Dry desulfurization, denitrification and dust removal integrated system |
| CN114931850B (en) * | 2022-07-08 | 2024-03-12 | 江苏天洁环保装备有限公司 | Dry desulfurization, denitrification and dust removal integrated system |
| CN117085481A (en) * | 2023-09-24 | 2023-11-21 | 合肥水泥研究设计院有限公司 | Flue gas denitration equipment for dry-method cement production line |
| CN117085481B (en) * | 2023-09-24 | 2024-05-10 | 合肥水泥研究设计院有限公司 | Flue gas denitration equipment for dry-method cement production line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214075960U (en) | Lime kiln tail gas desulfurization denitration dust removal integration processing apparatus | |
| CN206762557U (en) | The biomass electric power plant system for cleaning fume of dry desulfurization and low-temperature denitration | |
| CN110465169A (en) | A kind of integrative coordinated Processing tecchnics of high-temperature flue gas multi-pollutant and equipment | |
| CN105080332B (en) | Agglomerates of sintered pellets reclamation system and process | |
| CN106861350A (en) | The biomass electric power plant gas cleaning handling process and system of dry desulfurization and low-temperature denitration | |
| CN108854529A (en) | A kind of coke oven flue gas dirt sulphur nitre integration emission-control equipment | |
| CN108079785B (en) | Double-moving-bed reactor and application and treatment method thereof in flue gas dedusting and denitration integrated device | |
| CN107270268A (en) | A kind of boiler smoke minimum discharge device | |
| CN111760436A (en) | Flue gas pollutant removal system suitable for small-scale unit | |
| CN108837677A (en) | A kind for the treatment of process and its device of sintering flue gas minimum discharge | |
| CN206944178U (en) | A kind of smoke processing system | |
| CN109289475A (en) | A kind of high effective flue gas fair current dust-removal and desulfurizing disappears white processing method and its device | |
| CN204952658U (en) | Sintering pelletizing flue gas resource system | |
| CN206240329U (en) | Flue gas desulfurization denitration dust-removing system | |
| CN103768930A (en) | FCC regenerated flue gas dustproof denitration reactor | |
| CN219539931U (en) | Device for realizing dry desulfurization of flue gas by utilizing metal filter bag dust removal | |
| CN210473618U (en) | Low temperature SCR denitrification facility in steel rolling heating furnace flue gas dry desulfurization | |
| CN111111404A (en) | Flue gas treatment system and method for cement kiln | |
| CN110917863A (en) | Sintering flue gas is treatment system in coordination | |
| CN213885694U (en) | High-temperature flue gas dust removal denitration desulfurization system | |
| CN211799951U (en) | System for comprehensive treatment of flue gas | |
| CN212039464U (en) | Dry quenching diffused gas dust removal desulfurization system | |
| CN212327949U (en) | Cement kiln dry desulfurization and low-temperature SCR denitration system | |
| CN211925803U (en) | Biomass boiler flue gas desulfurization, dust removal and denitration integrated treatment system | |
| CN113144878A (en) | Dry-wet combined desulfurization and dust removal method for waste gas generated in brick making by blending burned sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |